Stopping mechanism for railway-cars.



F. c. WILLIAMS. STOPPING MECHANISM FOR RAILWAY CARS.

APPLICATION FILED AUGJS, 1912. 1,21 8 Patented Mar. '6, 1917.

Y MNN ms wnwsssss ATTORNEY PATENT OFFICE.

FRANK o. WILLIAMS. F PHILADELPHIA, PENNSYLVANIA. ASSIGN'OB TO THE SAFETY BLOCK SIGNAL COMPANY. A

CDRPORATION OF DELAWARE.

STOPPING MECHANISM RAILWAY-CARS.

Application filed Augustl To all whom it may concern:

Be it known that l, Fnaxn (."\\'im.i.\us a c tizen ot the United States and a resl-fl dent of Philadelphia,countv of Philadeh phia. State of PLlll1S \l\'ill1lih have invented certain new and useful Improvements in Stopping Mechanisms for Railway-Cars,

avhereot' the following is a specification. reference being ha d to the accompanyingdrawings.

This invention pa rticularlv relates to mechanism arranged to automatically shut off the track.

nism as 'vide me motive. powe and to simultaneously actuate the brake setting mechanism to stop a car or train in accordance with the position of signa ls disposed at suitable distances along the "The principal objects of this invention are to provide stopping mechanism operative to "nal is passed and to proected through the signal en said signal 1s safety 'set to automatically"reset said stopping mechanism"before it has affected the power controlling or' brake setting devlces to perfornrits function of stopping said earn train.

Other objects of this invention are to 'pro- Specification of Letters Patent.

ation of said stopping mecha- Patented Mar. 6, 1917. 5, 1912. Serial No. 715,179.

separated contact terminals which are respectively connected by electrical conductors to the track rail and to an insulated portion of the plate for tripping the valve controlling the stopping mechanism. the. partial circuit thus formed beingarranged to complete the partial circuit carried by the car or train for actuating the .re-setting mechanism.

' This invention also includes all of the various novel features of construction and arrangelnent hereinafter more definitely specified.

V In the accompanying drawings. Figure 1 is a diagrammatic illustration of the stopping mechanism. and the parts connected therewith, showing :i'convenient embodi'- ment of this invention. and Fig. 2 is a fragmentary elev'ational. View of the. tripping mechan'ism and its position relative to'the track rail which is shown in transverse sec tion. 7' a 1 Referring to the drawings, one embodiment of this invention comprises stopping mechanism which is shown in connection with a locomotive, comprising a boiler 5, and a truck wheel 6 arranged to traverse the track 7. Suitably disposed along the track 7 are tripping. plates 9, each having an insulated portion 10 connected by the electrical conductor 11-, through the battery 12 with the contact terminal 1410f the sigv vide a tripping member forming a normally I has the semaphm'e 16 C y" closed electric circuit. operative when'lifirken g the knife Switch '18 g flfi g V in an v inanner, to effect the actuation of tiles the nal Hand the terminal 19', which stopping mechanism: andto provide means l 18 ected by the electrical conduc- I connected to effect the actuation of said stoppi11g"mechanism when the pressure'in the svste'm falls below a predetermined limit.

This invention further includes pneumati- Qcallfv actuated mechanism primarily con sigha ls caclif'l tuatcdv mechani m. p i J Jcomprehends a series 0t trolled by "a mechanically-operated v actuated by tripping plates disposed at SUI-table, distances along the track, and

[secacondaril v controlled by an electrical .tua-ted valve. normally maintained ilrclosed position by a nornullly closed e'lectric'circuit which is arranged to be broken by. the ac tuation of the mechanically operated valve or by the actuation of the pne'11matically ac- This lover: in

i'ng i'ndicatin means arrangl-(L when in safety nosltlon to bridge tor 20 with the track rail 7;

' The tripping plates-9-arearranged to be engaged successiiely-bv the' tripping roller 21 mounted; on the shaft 22"journaled in the'be aringbox 24 which is yieldingly suspended by the hanger bolts 25 and 26 from surface of the bearing box 24. -The roller 21 is provided with an insulated electrical con ductor rin 30 extendingconcentrically adjacentlto t e periphery of said roller, .llnd

the bolster 27 which is carried by'the lo'cb- I Iand respectively connected with the brush plate a, the valve disk 37 will be uplifted from its seat 40 in the valve 36 in op osition the valve plug 66 being.extendedfithrough the core 70 of the magnet 71 andcarrying the armature 72, whereby the movable merit-F bers of the valve 60, including the valve disk" 63,- stem-65 and plug 66 may b'elactua'ted, when the magnet 71-is energized, as hereinafter described. r The piston rod-55 carries'th collar 73. ar-.

with the by the pipe 58 1 ports rangedto engage connected to'the casing of the valve the link 76, and pivotally connected stem 77 carrying the opposed =coni-. disks 78 and 79 whichare-arrangedjb cal val e through the con'ductord30 '.w :th' the ring 34.

to the pressure of the spring 41' which normally tends-to hold said disk on said seat.-

' The valve v36. when opened a-fiords. connection between'the ports 42' and 43, the port 42 being connected by the pipes 45,46 and 4-7 withthe pressure reservoir 48, and

the port-43 being connected by the pipes midi-'1]. with the rylinder 52 of the actuating lnecha ni s'm The cylinder I 54 having the piston-rod 55 which also-car ries the piston 56 of relatively greater surface, in the cylinder 60, having the port 61 connected by 62'and pipe 47 with the reservoir 48, said '59 and 61 being reontrolled by the valve disk 63 having the depending'stenr65 connected with the'conical valve plug .66 arranged to .close the passage-way 67 -be-' tween the port 59. and the exhaust outlet 68,

thellever 7% which is piva otally 7 5 by to alternately engage their respective. seats when actuated by said collar 73 engaging. the leverift, the valve disk-79. "having the.

" spring .80 normallytending .tdshift 'itto its I closed position,

l- 'n'ected by having positionh as shown in. Fig.1.

The-valve? 5 is provided isoperaive to release the throttle lever 52 is provided with a piston- 57, which connected with the port 59 of the valve the pipe with "the' ports 82 and 83,- the-port 82*being' connected with the trainlpipe '84:, and the port 83 being com I 86-vvith the cylinder 87 thepist'on 88 connected bvthe pis ton rod-89 with the'bell crank lever 90 \\'hi(;l11 9 I between the ports 82- and S3, and muse. quently brtrvrelrthe train pipe I and tincylinder 87, thepiston SM is shifted in lhv direction of the arrow indicated in thr r vlinder 87 to aposition beyond the exhaust outlet 94 to release the pressure in the train pipe 84: therethrough.

The throttle lever 91 is connected by. the link 96'w'ith the bell crank lever 97 which is connectedv with the stem 98 of the throttlr 99 so that when the locking bar 100 of the throttle lever 91 is released by pressing the hand grip lever 101 toward the handle 10'2. which-is effected by the bell crank lever 90 to disengage its lower free end'103 from the notches 104 of the sector 105, said lever is free to be shift-ed to control the-throttle 99, the automatic release of the locking'bar 101) being efi'e'ctcd by-t-hc-bell crank lever 90 when rocked on its pivotby the movement of the piston 88 in the direction of the arrow.

It may be here noted that the train' pipe HI inayii'ielude th ewell known intake setting devicesand as their structureforms no portiono'f this invention. they have been omitted fro'm the drawing for simplicity and clearness of illustration.

The coils of the magnet T1 have one termiwith the truck'wheel' 6 to form an electrical connection with the track'rail .7, and the [other terminal connected by the electrical conductor 108 with- .the depending bolt 26 roller 21'to th'e insulatedportion of the 'conj itac't pl ate 10disposedalong the rail 7 W In order -to v electrically afiect the actuadisk 37 hasanfu-pwardlyextending stem 109 providedwith" a head 110 forming .a' switch which jb1iidges,- -the -cap. between-the spring.

*nal connected by the electrical conductor-107- --;-ti'on of the-stopping mechanism, the valve I contacts 1111a'1id"112,the spring contact 111 v which is-engaged'by the brush'llfi connected by: the 3 electrical conductor-120 with the spring contact 121.- QThe spring contact 121 .op'erative positionas-shown in the drawing,

by the insldated plate 1 23Qforming a switch a on the collar 73 and saidspring contact 192 is 'connect-ed by theclect'rical eonilurtor 125 throughthebattery .126 .wit-hthe coils of the magnet- 114.

. @1319 magnet 11.4.is'provided"withian ar mature 1.30 which. carries a vert-1callvrc-.

rinroratory valve plug- 131forming part of'a valve provided with ports Tilt-1' and 134 and. an exhaust outlet 133. 5 Tlnjral'\'e .being connected by the electrical conductor. '113'wit-h the jcoilsof-the' magnet 114. and the r 'i electrical conductor 115 with :the -brush 116 11s connectedevith the.;.spring contart 122,..

when the pistonjsb t and som in their in- .plug 131 has op msitel v disposed conical ends arranged to engage alternately corresponding conical valve seats 137 and 138 to control the ports 133 and 134 and the exhaust outlet 135. Then the valve plug 131 is in engagement with its seat. 137, it closes the port 133 and simultaneously connects the ports 134 with the exhaust outlet 135; and when the valve plug 131 is in engagement with the other seat 138. it closes the exhaust outlet- 13:) and simultaneously establishes communication between the ports 133 and 134. The port 133 is connected by a pipe 140 through a regulating valve 141 15 and a pipe 45 to the port 42 in the valve 36,

so that when the circuit, including the magnet 114 is broken, the valve plug 131 falls and closes the exhaust outlet 135 and es 134 and pipe 51.

The regulatingvalve 141 is connected by a pipe 143 with the pipe 50, andis of 'such aconstruction that when the pressure in the compressed air reservoir 48 is above .a

predetermined point, no air is permitted to flow from the reservoir through the .pipes- 47, 46 and 45 and through the regulating valve 141 into the pipe 143, but when the pressure in the compressed air reservoir falls below such 7 a point, the regulating valve 141 will permit the air-from the reservoir to flow through the valve 141 and'into the pipe 143. As a construction of regulating valve suitable for performing this 4 function is well known, it is not thought necessary to give a complete illustrationand description of the details of construction iof i 4 this regulating valve 141. v The purpose ofthe regulating valve 141 in this instance is'to serve as a'means for applying the brakes and stopping the train in case the' a pressure in the compressed air reservoir 48 falls below a predetermined point, andthis regulating valve perforinsthis function by permitting air from the air reservoir 48 to flow into the pipe 143when, and onlywhen, the pressure lnthe reservoir 48 falls below I a predetermined point. fWhen. the air is admitted throughthe\ regulating valve 141 143,'Ipipe 50', pipe 51 and into t e cylinder 52 wherejitacts ppon the piston: 54 to force I the rpiston in the direction of the arrowand. thuscauses the] application of the' bra'kes andythestop age ofgthe'train as will appear, hereinaer. The construction, of the regulating valve 141 is such that it permits y the air to-flow-freelvat' all'times from the reservoir-48' through the pipe 46 and the fligregulating valvel il into 140, and" by the inclined dot and dashline in Fig. 1,

in which position the terminals 14 and 19 'are bridgedby the knife switch 18, then, as

the locomotive moves from right to left past the semaphore 16, and the corresponding trip plate 9 at the right hand of Fig.1, the roller 21 will be lifted by the inclined surface at the right hand end of the corresponding tripping plate 9. This upward 5 movement of the roller '21 effects the opening of the valve 36 to establish communication between the reservoir 48 through the pipes 47, 46 and 45, valve 36 and pipes 50 a11d 51 to the cylinder 52, to admit pres- 9 sure into said cylinder and j thereby drive the pistons 54 and 56 in the direction of the arrowindicated on thepiston rod Such movement ofthe piston causes the collar 73 to travel toward the lever 7 4 until the roller 21 passes over the insulation in the plate 9 to the insulated portion 10, whereupon if the signal is safety set, as assumed. a

closed electric circuit is established through the insulated portion 10 of. the plate 9,100 roller 21, bearing box 24, hanger bolt 26,

electrical conductor 108, coils of the magnet 71 electrical conductor 107, wheel 6. track '7, electrical conductor 20, knife switch 18 and electrical conductor 11, including the battery 12, to effect the opening of the valve disk 63 by which pressure from the reservoir 48 is admitted to the cylinder 57 to return the pistons-54- and 56 to their nor- -mal inoperative position as shown in the 116 drawing, beforethe collar 73 l1as engaged the lever74, whereby the stopping mechanism. is actuated without performing its function of stopping the train.

If, however, upon the engagement of the roller 21 with the plate 91 and its insulated portion 10, the semaphore 16 000117198 the vfd-a-ligel position as'shown in the drawing.

no closed circuit-for re-setting the stopping V mechanism can be established through the 1 terminals 14 and 191and therefore rthe movement of the pistons 54-and.56:in the diree tlfon 'ofthe arrow lndicated onthe piston rod 55 contipues until the collar engages the lever 74 and effects the movement of thevalve disk 7 9 to itsopen positionfwhich es-' tablishes eonununication' through the. po 4:5

82 and 83 from thetrain pipe 84 to thepipe 86 and cylinder .87, whereby 'the piston 88 i sh ft i gyfthc nhe r n-"Pip .1 0. g

the above construction embodies a number' Lotsub-mechanisms ofwhlch the train pipe Si; constitutes a part of-the braking mechanism 'or system proper andthevalve 78 with its/housing and lever T l, .is the valve which opens and closes the train pipe to apply the brakes. The pistons 5i and 56 with. their cylinders 5:2 and 57- respectively, the collar "7.3, and the valve 131. with its casing 132 ind-fthe electromagnet lll-connected thereto a t clung and actuating mechanism for the alve T8. The: tripping roller 33 and the alve IO' and its housing, constitutes a primary actuating mechanism which sets in not-ion the valve controlling and actuating ne'chani'sm above referred to and it operate's every time the roller 33 rides over lthe ramp rail or tripping plate 9, which is in fact a stationary member adjacent the trackv'for operating the primary actuating mechanism. 63, with its housing 60 and air pipe connections, together with the electric circuit in which the magnet 71 is included. constitutes an opposing mechanism, the 'function of which is'to oppose the operation of the controlling mechanism when the electric circuit therethrough is closed by the train when'the signal is safety set. In the embodiment of thisinvent ion illustrated in the drawing, the train stopping mechanism is shownas applied to asteam rail-, road, 91, being the throttle lever.

It is, of course, to be understood that the device is just as applicable to electric roads and that any other power controlling mechanism than .athrottle. such, for instance, asan electric-controller, may be operated in a similar manner the "compressed 'airfrom the train pipe when the track valve 78 s opened. I

- It is not desired to limit this" invention to the precise details of construction and arrangement herein set forth as various may be made therein without departing from the essential features of the invention as defined in the appended claims.

Claim:

1., In a stop mechanism for a car,fthe combinla bn with atrain pipe, a valve to open gain train pipe toactuate a brak =mecha-I (Shhlsm ,a valve operating mechanism, the

- na] 1s danger set.

d operated thereby, together with the el'cc-, ti calconnection or circuit 1n which said magnet 114:.15 included, constitutes a con The magnet controll l valve 'Having thus lde scrib'ed my invention I reset said valve operating mechanism to its normal original position, when said signal is at safety set and permitting said valve controlling mechanism to operate to its full extent and open said valve when said sig- 2. In a stopping mechanism for a car or train, the combination of a train pipe, a valve to open saidtrain pipe to apply-the brakes, a valve controlling and actuating mechanism, the full operation of which will open said valve, a primary actuating mccl1anism for actuating said valve controlling --mechanism and opposing mechanism to op pose the operation of said controlling mechanism, a track, a stationary member for operating said. primary actuating mechanism, a signal, and an electric circuit con nected .to said track and said stationary member and closed by the t ain or car when the signal is safety set, said circuit when closed including said stationary member, said actuating member, said opposing mechanism, said signal and said track, and operative when'closed to causesaid oppos-. ing mechanism to prevent the fulloperation of said controlling mechanism and to reset said controlling mechanism.

3. In stopping mechanism for a car, the combination of a valve. to operate the brake mechanism, of controlling means operative to open said valve to apply the brakes, a normally closed electric'circuit, actuatingmeans cooperating with said normally closed circuit operative when broken "so effect the actuation of said controllingmeans, a normally open electric signal cirsaid normally closed circuit and to close said normally open signal circuit when said signal is in safety position. p

'4. In stopping mechanismfor a car, the combination with avalve .to' apply the open saidivalve' to apply the brakes, it normally closed electric circuit, actuating means cooperative with said vnormally closed circult' for effecting the actuation of said controlling "means, I a normally open.

elites trio signal circuit, a signal-I included in =-lnalls"ooiiperating}with' jsaid normally ,brakes, of controlling means operative. to

"n0rma1lyopensignal-circuit,restrain 1'30 a controlling -means when said open signal circuit for opposing the operation of said controlling means. and means arranged to consecutively and automatically means beingactuated as the result of theopening of. said normally closed circuit regardless of the position of said signal and the actuation of said controlling means heil fl opposed as a result of the closing or said normally open signal circuit by the car when said signal is "safety set.

3. ln stopping mechanism for a car, the con'lbination with a valve for operating the brake system. of controlling means arranged to actuate said valve. a norm-all closed electric circuit. a normally open electric signal circuit. a signal included insaid normally open signal circuit. nyeans cooperating with said closed circuit tor actuating said controlling means. mtians cooperating with said normally open sigpal circuit for opposing actuationoi s'ai'll controlling means. and means controlledb v;-;the movement of the cal" for automatically and consecutively opening said normally closed circuit and closing said normally open circuit when said signal is i't'etv set.

li.-Iii stopping mechanism for a car. the combiluition with a track including rails of a signal. a tripping plate comprising two portions electricallyinsulated from each other. a normally open electric signal circuit connected to one of said portions and extending to one of said rails through said signal when safety"set, a valve for operating the brake for said car,..controlling means for actuating said valve, a tripping roller carried 13 said car and arranged to traverse said ."portions of said plate and cooperating with one of said portions to actuate said controlling means and cooperating with the other of said portions to close an electric circuit through said signal circuit to oppose the actuation of said signal is safet-v set.

- 7. In stopping mechanism-tor a car, the combination with a track including rails, of asignal. an elongated stationary tripping plate having a portion of its length electri- 'callv insulated from the remain ng portion thereof. a normally open electric signal circuit connected to one otsaid portions and exteiuling to one of said rails through said signal when safet set, a brake valve for said car. controlling means controlling said valve. tripping means carried by said car and arranged to engage portions of sa d plate consecutivel and when in engagement with the first of said portions of/said tripping plate to actuate said controlling means and when engagement with the secondof said portions to close s'aitl normally open trically insulated from the remaining portion thereof a normally open electric signal circuit connected to one of said portions and extending to one. of said rails through said signal when safety set, a valve for applying the air brakes to the car, controlling means operative to open said valve, an actuating valve. means cooperating therewith for actuating said controlling means tripping means carried by said car and arranged to engagesaid plate to actuate said valve, and means cooperating with said tripipng means when in engagement with the insulated portion of said tripping plate to close said normall open electric signal circuit throl'igh the engagement of the car with said ra'il when said signal is safety Set and oppos- ,s-ing means actuated by the current in said normally open signal circuit when said cir euit is closed through said signal to oppose actuation of said controlling means.

9..In stopping mechanism for a car, the combination with a track, including rails, of a signal. an elongated stationary tripping plate having a portionof its length electricall insulated from the remaining por- ,tion thereof, a normally open electric signal circuit connected to one of said portions of said plate and extending to one of said rails through said signal when safety set, a brake applying valve for said car, cont-rob ling" means for actuating said valve, a second valve and means cooperating therewith for actuating said controlling means, tripping means carried by said car and arranged to engage said tripping plate for positively actuating said second valve, and an electric device including connections therefor arranged to cooperate with said tripping means when in engagementwith the. said insulated portion of said tripping plate to' close said normally-open signal circuit when said signal is safety set and to oppose the actuation of said controlling means.

10. In stopping mechanism for a car or train arranged to traverse a track, the combination with signals disposed at suitable distances, of a fixed tripping plate for each signal, each of said plates-having an insulated portion electricallv connected to the track rail through said signal when safety set, an air brakesystem, a-controlling valve in said system, valve operating means aropen said valve,

, including ranged. to control the valve in said .system and including tandem, arranged cylinders, having pistons of. different diameters respectively, means actuated by said pistons to a pressure reservoir connected with said cylinders, a valve interposed between said reservoir and the'smaller cylinder, means carried bythe car and arranged to engage said tripping plates consecutively to openthe secondfmentioned valve for each signal passed, a valve interposed between said reservoir and the larger cylinder, and means electrically connected with the means for'engaging. said tripping pl ates, and forming a 1 closed circuit through said insulated portionandthrough.. said signal when 'safety set to actuate said last mentioned valve to admit pressure intothe larger cylinder-and preve t the actuation of the valve in the air brake system. j

11. In stopping mechanism'for a car or train arranged to traverse a track, thecombinationwith signals disposed at. suitable distances, of a fixed tripping plate for each signal, havingan cally connected with the track rail through said signal when-safety set, an air brake system, a valve in said system, a lever con-- nected to actuate said valve, valve actuating 'means comprising tandem arranged cy-lin-.'

ders respectivel of relatively di erent trolled by said pistons to actuate said'lever to-open said valve, a pressure reservoir, means connecting -said reservoir with the respective 'pist0ns', a valve interposed in the connection between said reservoir and the smaller cylinder, tripping means operatively connectedto open the .second valve by engagement with said vtripping plates upo'n' passing each signal to effect the actuationofsaid pistons and the'lever engaging means toward said lever, a valve interposed in the connection between said reservoir and the larger cylinder, and means I which is closed through thetripping means when said signal is safety set andwhen' said tripping means is in engagement with the insulated portion of the tripping plate, to actuate said .last mentioned va ve to cause the arrest of the movement of the pistons 'and to cause them to, return to their mop.-

erative positions before. opening the train pipe val-re. I

12. In stopping mechanismfor-a car or train arranged to traverse a track, the'combination with signals disposed at suitable distances, of a fixed tripping [late for each signal, having aninsulatedportion electrically connected with the track rail through said signal when safety set, an air brake systemincluding a valve operative to effect the setting of ,the brakes when-open, means arranged topop'en said valve, -comp r1s1ng insulated portion electr1- aving connected pistons diameters, means 'conmentioned a normally open electric circuit cylinders respectively having-pistons of relatlvely different diameters, connected together and carrying means to open said valve, a pressure reservoir connected with said cylinders, a'valve disposed in the conmotion between said reservoir and the smaller cylinder, normally tending to open by gravity and closed by means including a normallyclosed electric circuit,v mean's carried by the car for en aging said plates,'said circuit being broken by engagement, of said last mentioned means with said plates toad mit pressure into said smaller cylinder, a valve interposed between the pressure 1 voir and the larger cylinder-and normally maintained closed by gravity,. electrical .means including a normally open circuit which is closed through the signal when safety? set and when said plateiengaging der and to cause the returnjof said "pistons to their inoperative positions.

. 1 3. In stopping mechanism for a car or train'arranged to traverse, a track, the com-- bin-ation withsignals disposed at' su itable distances," of a fixed'trip'ping plate for each signal, having-an insulated portion electrically connected with the track rail through saidfsignel when s afety set, anairfbrake system including an air brake valve, means to actuate. said 1 valve, comprising cylinders havingconnected pistons of, relatively different diameters, "carrying means operative to eifect the 'o'penin'gi'a-nd clo'sing of said valve, a pressure reservoir connected with said cylinders, an electrically vactuated valve interposed in .the connection between said reservoirand the smaller cylinder 'and including electrical'mean's comprising :1 normally closed electric circuit having a'switch, means carried'in the path of said plates and arranged to'- be uplifted thereby when (an ga'ged therewith toopen said switch and effect the actuation of the second mentioned valve by breaking said closed electric circuit, andava'lve interposed in the connection between said" reservoir and the larger cylinder and having electrical actuating means, included in a normally open electric circuit, including the meansfor engaging sald trn pmg plates and "closed thereby 'throughthe safety? set-signal. when enbination-with signals disposed at suitable distances,-'ofla fixed trippingfplate for each signal, having an insulated-portion electricallyconnectedwith the track rail through said signalwvhen;safety? set, an air brake ys em including an air brake valve. for releasi'ng said system, means arrangedto ac tu'ate said valvecomprismg cylinders hav- -means controlled said pistons to open said valve, a. tripping roller carried in the ath of said plates and arranged to be uplfted thereby, an electrical conductor carried by said roller and disposed adjacent to the periphery thereof in insulated relation thereto, and having terminals comprising brush rings surrounding. the shaft of said roller, a pressure reservoir connected withsaid cylinders, a valve interposed in a connection between said reservoir and the smaller cylinder for controllin the same, and means normally holding said last mentioned valve closed and including a normally closed electric circuit having brushes respectively rings, and having a switch opened by the upward movement of said roller when engaging. said contact plates, and operative to reak said closed electric circuit to admit pressure into the smaller cylinder, and a valve interposed in the connection between said reservoir and thelarger cylinder, electrically actuated by means'including a normally open electric circuit connected through said'roller and the insulated portion of said tripping plate when the signal is safety set. a

15. In stopping mechanism 'for a car or train arranged to traverse a vtraclqthe combination withsignals disposed at suitable distances, of a fixed trippin plate for each when safety set, throttle con: trolling mechanism, actuated to operate said'throttle controlling mechanism, comprising a cylinder havingan inlet .and an outletyand a piston. normally disposed between said inlet and said outlet, an air brake system connectedwith the-inlet of said cylinder and having anair brake ,valve therein, means arranged to ac tuate said last mentioned valve comprising cylinders having connected pistons of relatively different diameters, a pressure reservoir connected with each of said cylinders, a valve interposed in the connection between said reservoir and the smaller cylinder,

means including a normally closed electric circuit for actuating said last ment oned! d in the connection valve, avalve interpose between said reservoir and the larger cylinder means, including a-normallyopen electric circuit for actuating-said last -Inentionedvalve, and tripping means arranged to engage said plates consecutively to break said normally closed electric circuit for each signal passed, and arranged to close the normally open electric circuit through the corresponding insulated port1on of the correspondin one of said plates nal is sa ety set.

16. In a stopping mechanism fora car or oppose the p p mechanism, and an electric circuit, comm contact w1th sa1d terminal.

mechanism, said'..primary actuating 'msm being operativawhen the said circuit portion elecmeans automatically .nected to said cylinders,

said signal is I into the larger oneof sald cyllnders to pre-.

when the sigtrain, the combination with a, s

and a stationary insulated'mem r adjacent the track, of a stop mechanism cooperating therewith and carried by the trainor car, and comprlsing a train pipe, a valve to open pleted by the train when said signal is safety set, through saidstationa main, bar, said 'actuatingimechanism, sai oppose ing' mechanism and said track, and operative to cause 'saidopposing mechanismto prevent the operation. of said controlling mechanism and-to; reset said controlling mechais open or broken to actuate said valve controlling mechanism to its full extent and to open said valve. 17 In stopping mechanismior a car or train arranged to traverse a track, the combination with a signal positioned'adjacent said track, of a fixed tripping plate electrically. connected toa railof said'track through said signalwhen safety set, an air. brake system, a controlling valve in said system, means arranged to control said valve .70 sa1dtramp1pe to apply the brakes, a power controlling mechanism operated from and including a pair of hollow cylinders of different internal diamete'rsprovided with pistons of corresponding diameters, means actuated by one of said pistons to open said controlling valve, a pressure reservoir c0n of said cylinders, means carried by the car and arranged; to engage said tri ping. plate to open said ,last mentioned va ve, a'valve interposed between said i reservoir and the larger one of said cylinders, andelectrical means coiiperating with said 'means] for engaging said trippingfplate for causing the actuation ofsaid last-me tioned-va'lve when afety set to admitpressure a valve interposed between saidres'ervoir' and "the smaller one f vent the actuation of said-controlling valve in said air'brakesystem.

18. In stop ing' mechanism for a car or train arrange to traversea track,=the combination with a signal positioned "adjacent said track, of a fixed tripping plate 8100-.

vided with pistons of corresponding diameters, means actnated by one of said pistons to opensaid .cont-rolhng valve, a pressure reservoir connected to said cylinders, a-

valve interposed between said reservoir and the smaller one of said cylinders, means carried by the car and arranged to engage said tripping plate to open said last mentioned valve a valve interposed between said'reservoir andthe larger one of said Cylinders, and electrical means cooperating .with said means for engaging said tripping plate for tioned valve when saidsignal is safety set to admit pressure into the larger one of said cylinders to preventthe actuation of said controlling valve in said air brake system.

In witness whereof, I have hereunto set my hand this 12th day. of Angl'lst, 1912.

FRANK o. WILLIAMS. lVitnesses- 'J'AY R. GRIER,

CLIFTON C. IIALLOVELL. 

